Use this calculator and then mix it well by stirring the mixture. You can put the oils one at a time. If you have a plastic syringe, use it to get the correct amount. I work in the hospital so I have a lot of them .
http://www.gesilicones.com/gesilwiza...ng/fluid2.html
After you get the correct consistency/viscosity, just pour them or use the syringe to put the oil into the diff cup.